CVE-2024-49850

Kernel crash via malformed BPF CO-RE relocation

Published Oct 21, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel allows local users to crash the kernel via a malformed BPF CO-RE relocation record. In kernel/bpf/btf.c, bpf_core_calc_relo_insn dereferences a missing BTF type after a BPF_CORE_TYPE_ID_LOCAL record supplies a nonexistent type ID. The path accepts malformed relocation records from user space; successful triggering causes availability loss without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel allows local users to crash the kernel via a malformed BPF CO-RE relocation record. In kernel/bpf/btf.c, bpf_core_calc_relo_insn dereferences a missing BTF type after a BPF_CORE_TYPE_ID_LOCAL record supplies a nonexistent type ID. The path accepts malformed relocation records from user space; successful triggering causes availability loss without reported data disclosure or modification.

The record

CVE
CVE-2024-49850
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.17
  2. Affected versionversion=74753e1462e77349525daf9eb60ea21ed92d3a97 <2288b54b96dcb55bedebcef3572bb8821fc5e708
  3. Affected versionversion=74753e1462e77349525daf9eb60ea21ed92d3a97 <3d2786d65aaa954ebd3fcc033ada433e10da21c4
  4. Affected versionversion=74753e1462e77349525daf9eb60ea21ed92d3a97 <584cd3ff792e1edbea20b2a7df55897159b0be3e
  5. Affected versionversion=74753e1462e77349525daf9eb60ea21ed92d3a97 <dc7ce14f00bcd50641f2110b7a32aa6552e0780f
  6. Affected versionversion=74753e1462e77349525daf9eb60ea21ed92d3a97 <e7e9c5b2dda29067332df2a85b0141a92b41f218

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=74753e1462e77349525daf9eb60ea21ed92d3a97 <2288b54b96dcb55bedebcef3572bb8821fc5e708; version=74753e1462e77349525daf9eb60ea21ed92d3a97 <3d2786d65aaa954ebd3fcc033ada433e10da21c4; version=74753e1462e77349525daf9eb60ea21ed92d3a97 <584cd3ff792e1edbea20b2a7df55897159b0be3e; version=74753e1462e77349525daf9eb60ea21ed92d3a97 <dc7ce14f00bcd50641f2110b7a32aa6552e0780f; version=74753e1462e77349525daf9eb60ea21ed92d3a97 <e7e9c5b2dda29067332df2a85b0141a92b41f218

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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